Sintech NGFF M.2 Dual Notch SSD Adapter Card for Replace Sandisk SD5se2/SDSA5JK ADATA XM11 SSD of Asus Zenbook UX31 UX21 Alow NGFF SSD to work as 18pin SSD of Asus Zenbook UX31 UX21 Designed for M.2 NGFF B+M Key SATA SSD's only,not support M Key PCIe SSD Support 4sizes NGFF M.2 Socket SSD: type 2230, type 2242,type 2260,type 2280 No need extra power supply PCB size is same as SSD from Asus UX31 UX21 Zenbook,PCB dimension: 94mm x 24mm (LxW)